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  GBase8s数据库SQL语句耗时跟踪
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  <h1 id="浦发压测100毫秒以上的SQL统计"><a href="#浦发压测100毫秒以上的SQL统计" class="headerlink" title="浦发压测100毫秒以上的SQL统计"></a>浦发压测100毫秒以上的SQL统计</h1><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta prompt_">#</span><span class="language-bash">开启trace</span></span><br><span class="line">dbaccess sysadmin &lt;&lt;!</span><br><span class="line">	execute function task(&quot;set sql tracing on&quot;, 20000, 10,&quot;low&quot;,&quot;global&quot;); </span><br><span class="line">!</span><br></pre></td></tr></table></figure>

<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta prompt_">#</span><span class="language-bash">查看his结果</span></span><br><span class="line">onstat -g his &gt; /tmp/topsql.his</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">查看100毫秒以上的sql</span></span><br><span class="line">dbaccess sysmaster &lt;&lt;!</span><br><span class="line">	unload to /tmp/topsql.100 select sql_runtime,sql_executions,sql_statement </span><br><span class="line">from </span><br><span class="line">    syssqltrace t,</span><br><span class="line">    syssqltrace_iter i</span><br><span class="line">where </span><br><span class="line">	t.sql_id = i.sql_id</span><br><span class="line">	and sql_runtime &gt; 0.100</span><br><span class="line">order by 1 desc;</span><br><span class="line">!</span><br><span class="line"></span><br><span class="line">cat /tmp/topsql.100 |more</span><br></pre></td></tr></table></figure>

<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta prompt_">#</span><span class="language-bash">关闭trace</span></span><br><span class="line">dbaccess sysadmin &lt;&lt;!</span><br><span class="line">	execute function sysadmin:task(&quot;SET SQL TRACING OFF&quot;);</span><br><span class="line">!</span><br></pre></td></tr></table></figure>









<h1 id="知识："><a href="#知识：" class="headerlink" title="知识："></a>知识：</h1><h2 id="1-开启SQL跟踪"><a href="#1-开启SQL跟踪" class="headerlink" title="1  开启SQL跟踪"></a>1  开启SQL跟踪</h2><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta prompt_">#</span><span class="language-bash">开启SQL跟踪的参数</span></span><br><span class="line">level = [off, low, med, high]</span><br><span class="line">ntraces = [跟踪的SQL语句的数量]</span><br><span class="line">size = [每个跟踪缓冲区的大小，以KB为单位]</span><br><span class="line">mode = [global, user]</span><br><span class="line">level=low, ntraces=10000, size=10, mode=global</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">Shell&gt; </span><span class="language-bash">su - gbasedbt</span></span><br><span class="line"><span class="meta prompt_">Shell&gt; </span><span class="language-bash">dbaccess sysadmin -</span></span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">高且全局</span></span><br><span class="line"><span class="meta prompt_">Shell&gt; </span><span class="language-bash">execute <span class="keyword">function</span> task (<span class="string">&quot;set sql tracing on&quot;</span>,30000, <span class="string">&quot;100&quot;</span>,<span class="string">&quot;high&quot;</span>,<span class="string">&quot;global&quot;</span>);<span class="string">&#x27;</span></span> </span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash"><span class="string">低且具体用户</span></span></span><br><span class="line"><span class="meta prompt_">Shell&gt; </span><span class="language-bash"><span class="string">execute function task(&quot;set sql tracing on&quot;, 20000, 10,&quot;low&quot;,&quot;user&quot;);</span></span> </span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash"><span class="string">指定会话</span></span></span><br><span class="line"><span class="meta prompt_">Shell&gt; </span><span class="language-bash"><span class="string">execute function task(&quot;set sql user tracing on&quot;,11044);</span></span></span><br><span class="line"></span><br></pre></td></tr></table></figure>

<h2 id="2-执行语句"><a href="#2-执行语句" class="headerlink" title="2  执行语句"></a>2  执行语句</h2><pre><code>    ......或者运行业务。
</code></pre>
<h2 id="3-查询跟踪情况用命令"><a href="#3-查询跟踪情况用命令" class="headerlink" title="3 查询跟踪情况用命令"></a>3 查询跟踪情况用命令</h2><figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">onstat -g his</span><br></pre></td></tr></table></figure>

<h2 id="3-查询耗时最多的语句"><a href="#3-查询耗时最多的语句" class="headerlink" title="3 查询耗时最多的语句"></a>3 查询耗时最多的语句</h2><figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">select</span> <span class="keyword">first</span> <span class="number">500</span> sql_runtime,sql_executions,sql_statement </span><br><span class="line"><span class="keyword">from</span> </span><br><span class="line">	syssqltrace t,</span><br><span class="line">	syssqltrace_iter i</span><br><span class="line"><span class="keyword">where</span> t.sql_id <span class="operator">=</span> i.sql_id </span><br><span class="line"><span class="keyword">order</span> <span class="keyword">by</span> <span class="number">1</span> <span class="keyword">desc</span>;</span><br></pre></td></tr></table></figure>

<h2 id="4-关闭SQL跟踪"><a href="#4-关闭SQL跟踪" class="headerlink" title="4  关闭SQL跟踪"></a>4  关闭SQL跟踪</h2><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">echo &#x27; execute function sysadmin:task(&quot;SET SQL TRACING OFF&quot;); &#x27; | dbaccess sysadmin</span><br><span class="line"></span><br></pre></td></tr></table></figure>



<p>参数没改，重启trace失效：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta prompt_">#</span><span class="language-bash"><span class="comment">##################################################################</span></span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">SQL Tracing and EXPLAIN Plan Configuration Parameters</span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash"><span class="comment">##################################################################</span></span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">EXPLAIN_STAT - Enables (1) or disables (0) including the Query</span> </span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">               Statistics section <span class="keyword">in</span> the EXPLAIN output file</span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">SQLTRACE     - Configures SQL tracing. The format is:</span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">               SQLTRACE level=(low|med|high),ntraces=&lt;<span class="comment">#&gt;,size=&lt;#&gt;,</span></span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">               mode=(global|user)</span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">               Example:</span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">               SQLTRACE level=low,ntraces=1000,size=2,mode=global</span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash"><span class="comment">##################################################################</span></span></span><br><span class="line"></span><br><span class="line">EXPLAIN_STAT 1</span><br><span class="line"></span><br><span class="line"></span><br></pre></td></tr></table></figure>



<table>
<thead>
<tr>
<th>Column</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody><tr>
<td><strong>sql_id</strong></td>
<td>int8</td>
<td>Unique SQL execution ID</td>
</tr>
<tr>
<td><strong>sql_address</strong></td>
<td>int8</td>
<td>Address of the statement in the code block</td>
</tr>
<tr>
<td><strong>sql_sid</strong></td>
<td>int</td>
<td>Database session ID of the user running the SQL statement</td>
</tr>
<tr>
<td><strong>sql_uid</strong></td>
<td>int</td>
<td>User ID of the statement running the SQL</td>
</tr>
<tr>
<td><strong>sql_stmttype</strong></td>
<td>int</td>
<td>Statement type</td>
</tr>
<tr>
<td><strong>sql_stmtname</strong></td>
<td>char(40)</td>
<td>Statement type displayed as a word</td>
</tr>
<tr>
<td><strong>sql_finishtime</strong></td>
<td>int</td>
<td>Time this statement completed (UNIX)</td>
</tr>
<tr>
<td><strong>sql_begintxtime</strong></td>
<td>int</td>
<td>Time this transaction started</td>
</tr>
<tr>
<td><strong>sql_runtime</strong></td>
<td>float</td>
<td>Statement execution time</td>
</tr>
<tr>
<td><strong>sql_pgreads</strong></td>
<td>int</td>
<td>Number of disk reads for this SQL statement</td>
</tr>
<tr>
<td><strong>sql_bfreads</strong></td>
<td>int</td>
<td>Number of buffer reads for this SQL statement</td>
</tr>
<tr>
<td><strong>sql_rdcache</strong></td>
<td>float</td>
<td>Percentage of time the page was read from the buffer pool</td>
</tr>
<tr>
<td><strong>sql_bfidxreads</strong></td>
<td>int</td>
<td>Number of index page buffer reads</td>
</tr>
<tr>
<td><strong>sql_pgwrites</strong></td>
<td>int</td>
<td>Number of pages written to disk</td>
</tr>
<tr>
<td><strong>sql_bfwrites</strong></td>
<td>int</td>
<td>Number of pages modified and returned to the buffer pool</td>
</tr>
<tr>
<td><strong>sql_wrcache</strong></td>
<td>float</td>
<td>Percentage of time a page was written to the buffer pool but not to disk</td>
</tr>
<tr>
<td><strong>sql_lockreq</strong></td>
<td>int</td>
<td>Total number of locks required by this SQL statement</td>
</tr>
<tr>
<td><strong>sql_lockwaits</strong></td>
<td>int</td>
<td>Number of times the SQL statement waited on locks</td>
</tr>
<tr>
<td><strong>sql_lockwttime</strong></td>
<td>float</td>
<td>Time the system waited for locks during SQL statement</td>
</tr>
<tr>
<td><strong>sql_logspace</strong></td>
<td>int</td>
<td>Amount of space the SQL statement used in the logical log</td>
</tr>
<tr>
<td><strong>sql_sorttotal</strong></td>
<td>int</td>
<td>Number of sorts that ran for the statement</td>
</tr>
<tr>
<td><strong>sql_sortdisk</strong></td>
<td>int</td>
<td>Number of sorts that ran on disk</td>
</tr>
<tr>
<td><strong>sql_sortmem</strong></td>
<td>int</td>
<td>Number of sorts that ran in memory</td>
</tr>
<tr>
<td><strong>sql_executions</strong></td>
<td>int</td>
<td>Number of times the SQL statement ran</td>
</tr>
<tr>
<td><strong>sql_totaltime</strong></td>
<td>float</td>
<td>Total amount of time spent running the statement</td>
</tr>
<tr>
<td><strong>sql_avgtime</strong></td>
<td>float</td>
<td>Average amount of time spent running the statement</td>
</tr>
<tr>
<td><strong>sql_maxtime</strong></td>
<td>float</td>
<td>Maximum amount of time spent executing the SQL statement</td>
</tr>
<tr>
<td><strong>sql_numiowaits</strong></td>
<td>int</td>
<td>Number of times an I&#x2F;O operation had to wait</td>
</tr>
<tr>
<td><strong>sql_avgiowaits</strong></td>
<td>float</td>
<td>Average amount of time that the SQL statement had to wait</td>
</tr>
<tr>
<td><strong>sql_totaliowaits</strong></td>
<td>float</td>
<td>Total amount of time that the SQL statement had to wait for I&#x2F;O. This excludes any asynchronous I&#x2F;O.</td>
</tr>
<tr>
<td><strong>sql_rowspersec</strong></td>
<td>float</td>
<td>Average number of rows (per second) produced</td>
</tr>
<tr>
<td><strong>sql_estcost</strong></td>
<td>int</td>
<td>Cost associated with the SQL statement</td>
</tr>
<tr>
<td><strong>sql_estrows</strong></td>
<td>int</td>
<td>Estimated number of rows returned for the SQL statement as predicted by the optimizer</td>
</tr>
<tr>
<td><strong>sql_actualrows</strong></td>
<td>int</td>
<td>Number of rows returned for the SQL statement</td>
</tr>
<tr>
<td><strong>sql_sqlerror</strong></td>
<td>int</td>
<td>SQL error number</td>
</tr>
<tr>
<td><strong>sql_isamerror</strong></td>
<td>int</td>
<td>RSAM&#x2F;ISAM error number</td>
</tr>
<tr>
<td><strong>sql_isollevel</strong></td>
<td>int</td>
<td>Isolation level of the SQL statement.</td>
</tr>
<tr>
<td><strong>sql_sqlmemory</strong></td>
<td>int</td>
<td>Number of bytes needed to execute the SQL statement</td>
</tr>
<tr>
<td><strong>sql_numiterators</strong></td>
<td>int</td>
<td>Number of iterators used by the statement</td>
</tr>
<tr>
<td><strong>sql_database</strong></td>
<td>char(128)</td>
<td>Database name</td>
</tr>
<tr>
<td><strong>sql_numtables</strong></td>
<td>int</td>
<td>Number of tables used in executing the SQL statement</td>
</tr>
<tr>
<td><strong>sql_tablelist</strong></td>
<td>char(4096)</td>
<td>List of table names directly referenced in the SQL statement. If the SQL statement fires triggers that execute statements against other tables, the other tables are not listed.</td>
</tr>
<tr>
<td><strong>sql_statement</strong></td>
<td>char(1600)</td>
<td>SQL statement that ran</td>
</tr>
</tbody></table>
<p>  <strong>syssqltrace</strong>  表提供了详细信息 关于单个 SQL 语句。 </p>
<table>
<thead>
<tr>
<th>列</th>
<th>类型</th>
<th>描述</th>
</tr>
</thead>
<tbody><tr>
<td><strong>sql_id</strong></td>
<td>国际8</td>
<td>唯一的 SQL 执行 ID</td>
</tr>
<tr>
<td><strong>sql_address</strong></td>
<td>国际8</td>
<td>代码块中语句的地址</td>
</tr>
<tr>
<td><strong>sql_sid</strong></td>
<td>国际</td>
<td>运行 SQL 的用户的数据库会话 ID 陈述</td>
</tr>
<tr>
<td><strong>sql_uid</strong></td>
<td>国际</td>
<td>运行 SQL 的语句的用户标识</td>
</tr>
<tr>
<td><strong>sql_stmttype</strong></td>
<td>国际</td>
<td>语句类型</td>
</tr>
<tr>
<td><strong>sql_stmtname</strong></td>
<td>字符（40）</td>
<td>显示为单词的语句类型</td>
</tr>
<tr>
<td><strong>sql_finishtime</strong></td>
<td>国际</td>
<td>此语句完成的时间 （UNIX）</td>
</tr>
<tr>
<td><strong>sql_begintxtime</strong></td>
<td>国际</td>
<td>此事务开始的时间</td>
</tr>
<tr>
<td><strong>sql_runtime</strong></td>
<td>浮</td>
<td>语句执行时间</td>
</tr>
<tr>
<td><strong>sql_pgreads</strong></td>
<td>国际</td>
<td>此 SQL 语句的磁盘读取次数</td>
</tr>
<tr>
<td><strong>sql_bfreads</strong></td>
<td>国际</td>
<td>此 SQL 语句的缓冲区读取数</td>
</tr>
<tr>
<td><strong>sql_rdcache</strong></td>
<td>浮</td>
<td>从缓冲区读取页面的时间百分比 池</td>
</tr>
<tr>
<td><strong>sql_bfidxreads</strong></td>
<td>国际</td>
<td>索引页缓冲区读取次数</td>
</tr>
<tr>
<td><strong>sql_pgwrites</strong></td>
<td>国际</td>
<td>写入磁盘的页数</td>
</tr>
<tr>
<td><strong>sql_bfwrites</strong></td>
<td>国际</td>
<td>修改并返回到缓冲区的页数 池</td>
</tr>
<tr>
<td><strong>sql_wrcache</strong></td>
<td>浮</td>
<td>页面写入缓冲区的时间百分比 池但不到磁盘</td>
</tr>
<tr>
<td><strong>sql_lockreq</strong></td>
<td>国际</td>
<td>此 SQL 语句所需的锁总数</td>
</tr>
<tr>
<td><strong>sql_lockwaits</strong></td>
<td>国际</td>
<td>SQL 语句等待锁的次数</td>
</tr>
<tr>
<td><strong>sql_lockwttime</strong></td>
<td>浮</td>
<td>系统在 SQL 语句期间等待锁定的时间</td>
</tr>
<tr>
<td><strong>sql_logspace</strong></td>
<td>国际</td>
<td>SQL 语句在逻辑中使用的空间量 .log</td>
</tr>
<tr>
<td><strong>sql_sorttotal</strong></td>
<td>国际</td>
<td>为语句运行的排序数</td>
</tr>
<tr>
<td><strong>sql_sortdisk</strong></td>
<td>国际</td>
<td>磁盘上运行的排序数</td>
</tr>
<tr>
<td><strong>sql_sortmem</strong></td>
<td>国际</td>
<td>在内存中运行的排序数</td>
</tr>
<tr>
<td><strong>sql_executions</strong></td>
<td>国际</td>
<td>SQL 语句运行的次数</td>
</tr>
<tr>
<td><strong>sql_totaltime</strong></td>
<td>浮</td>
<td>运行语句所花费的总时间</td>
</tr>
<tr>
<td><strong>sql_avgtime</strong></td>
<td>浮</td>
<td>运行语句所花费的平均时间</td>
</tr>
<tr>
<td><strong>sql_maxtime</strong></td>
<td>浮</td>
<td>执行 SQL 所花费的最大时间 陈述</td>
</tr>
<tr>
<td><strong>sql_numiowaits</strong></td>
<td>国际</td>
<td>I&#x2F;O 操作必须等待的次数</td>
</tr>
<tr>
<td><strong>sql_avgiowaits</strong></td>
<td>浮</td>
<td>SQL 语句的平均时间量 等待</td>
</tr>
<tr>
<td><strong>sql_totaliowaits</strong></td>
<td>浮</td>
<td>SQL 语句具有的总时间量 以等待 I&#x2F;O。这不包括任何异步 I&#x2F;O。</td>
</tr>
<tr>
<td><strong>sql_rowspersec</strong></td>
<td>浮</td>
<td>生成的平均行数（每秒）</td>
</tr>
<tr>
<td><strong>sql_estcost</strong></td>
<td>国际</td>
<td>与 SQL 语句关联的成本</td>
</tr>
<tr>
<td><strong>sql_estrows</strong></td>
<td>国际</td>
<td>为 SQL 语句返回的估计行数 正如优化器所预测的那样</td>
</tr>
<tr>
<td><strong>sql_actualrows</strong></td>
<td>国际</td>
<td>为 SQL 语句返回的行数</td>
</tr>
<tr>
<td><strong>sql_sqlerror</strong></td>
<td>国际</td>
<td>SQL 错误号</td>
</tr>
<tr>
<td><strong>sql_isamerror</strong></td>
<td>国际</td>
<td>RSAM&#x2F;ISAM 错误号</td>
</tr>
<tr>
<td><strong>sql_isollevel</strong></td>
<td>国际</td>
<td>SQL 语句的隔离级别。</td>
</tr>
<tr>
<td><strong>sql_sqlmemory</strong></td>
<td>国际</td>
<td>执行 SQL 语句所需的字节数</td>
</tr>
<tr>
<td><strong>sql_numiterators</strong></td>
<td>国际</td>
<td>语句使用的迭代器数</td>
</tr>
<tr>
<td><strong>sql_database</strong></td>
<td>字符（128）</td>
<td>数据库名称</td>
</tr>
<tr>
<td><strong>sql_numtables</strong></td>
<td>国际</td>
<td>用于执行 SQL 语句的表数</td>
</tr>
<tr>
<td><strong>sql_tablelist</strong></td>
<td>字符（4096）</td>
<td>直接引用的表名列表 SQL 语句。如果 SQL 语句触发执行语句的触发器 对于其他表，不会列出其他表。</td>
</tr>
<tr>
<td><strong>sql_statement</strong></td>
<td>字符（1600）</td>
<td>运行的 SQL 语句</td>
</tr>
</tbody></table>
 
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